CN109274147A - Wireless charging receiver, charging system and terminal - Google Patents
Wireless charging receiver, charging system and terminal Download PDFInfo
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- CN109274147A CN109274147A CN201811137409.2A CN201811137409A CN109274147A CN 109274147 A CN109274147 A CN 109274147A CN 201811137409 A CN201811137409 A CN 201811137409A CN 109274147 A CN109274147 A CN 109274147A
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Classifications
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- H02J7/025—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
Abstract
The disclosure is directed to a kind of wireless charging receiver, charging system and terminals.The wireless charging receiver, comprising: receiving coil receives chip and switching capacity conversion chip；Receiving coil, the alternating magnetic field of the transmitting coil for coupling wireless charging emitter, obtains AC power source；The input terminal and receiving coil for receiving chip couple, and the input terminal of the output end and switching capacity conversion chip that receive chip couples, for AC power source to be converted to the first DC power supply；The output end and battery of switching capacity conversion chip couple, for exporting the second DC power supply based on the first DC power supply, and being based on the second DC power supply is battery charging, the voltage of second DC power supply is lower than the voltage of the first DC power supply, and the electric current of the second DC power supply is higher than the electric current of the first DC power supply.The disclosure improves charge power and charge efficiency.
Description
Technical field
This disclosure relates to field of terminal more particularly to a kind of wireless charging receiver, charging system and terminal.
Background technique
With being widely used for terminal, wireless charging technology becomes a kind of important form that terminal charges.
In the related technology, terminal inner is provided with wireless charging receiver, wireless charging receiver and wireless charging
Coil is provided with inside emitter.Electric current in wireless charging emitter can generate electromagnetic field when flowing through charge coil,
When the coil of wireless charging receiver is close to electromagnetic field, electric current can be generated inside wireless charging receiver, to utilize
Conversion between electric current and electromagnetic field charges to terminal.The input voltage of the battery of terminal is smaller, such as 4V, in order to improve
The output voltage of charge power and efficiency, wireless charging emitter is usually higher, and passes through wireless charging receiver and nothing
The Buck conversion circuit (BUCK circuit) being arranged inside line charge electricity emitter completes voltage conversion.
Summary of the invention
To overcome the problems in correlation technique, the disclosure provide a kind of wireless charging receiver, charging system and
Terminal.
According to the first aspect of the embodiments of the present disclosure, a kind of wireless charging receiver is provided, comprising: receiving coil connects
Receive chip and switching capacity conversion chip；Receiving coil, the alternation magnetic of the transmitting coil for coupling wireless charging emitter
, obtain AC power source；
The input terminal and receiving coil for receiving chip couple, and receive the defeated of the output end of chip and switching capacity conversion chip
Enter end coupling, for AC power source to be converted to the first DC power supply；
The output end and battery of switching capacity conversion chip couple, for exporting the second direct current based on the first DC power supply
Source, and be that battery charges based on the second DC power supply, the voltage of the second DC power supply lower than the first DC power supply voltage, and the
The electric current of two DC power supplies is higher than the electric current of the first DC power supply.
In a kind of design in the cards, switching capacity conversion chip includes first order switching capacity conversion chip and
Secondary switch capacitor conversion chip；Wireless charging receiver further include: power management chip PMIC；
The input terminal of first order switching capacity conversion chip and reception chip coupling, first order switching capacity conversion chip
Output end is coupled with the input terminal of second level switching capacity conversion chip and power management chip respectively, and second level switching capacity turns
The output end for changing chip and power management chip is coupled with battery；
First order switching capacity conversion chip, for exporting third DC power supply, third direct current based on the first DC power supply
The voltage of power supply is lower than the voltage of the first DC power supply, and the electric current of third DC power supply is higher than the electric current of the first DC power supply；
Second level switching capacity conversion chip, for exporting the second DC power supply based on third DC power supply, and based on the
Two DC power supplies charge using the first electric current as battery, and the voltage of the second DC power supply is lower than the voltage of third DC power supply,
And second DC power supply electric current be higher than third DC power supply electric current；
Power management chip, for being charged based on the second DC power supply using the second electric current as battery, and the second electric current
Less than the first electric current.
In a kind of design in the cards, switching capacity conversion chip is also used to detection path electric current, and in access electricity
When stream is greater than or equal to the sum of current threshold and the first current offset amount, control switch capacitor conversion chip enters current-limit mode,
First current offset amount is greater than or is greater than 0, and is less than current threshold.
In a kind of design in the cards, switching capacity conversion chip specifically includes following for entering current-limit mode
At least one of:
Increase the conducting resistance of the internal switch pipe of switching capacity conversion chip；Alternatively, disconnecting switching capacity conversion chip
In to charging capacitor charge internal switch pipe；Alternatively, the output that charging capacitor is parallel to switching capacity conversion chip is enterprising
Row electric discharge；Alternatively, reducing the charging time of charging capacitor in switching capacity conversion chip.
In a kind of design in the cards, switching capacity conversion chip is also used to be less than current threshold in passage current
And when the difference of the second current offset amount, control switch capacitor conversion chip exits current-limit mode, the second current offset amount be greater than or
Greater than 0, and it is less than current threshold.
In a kind of design in the cards, passage current includes any one in following:
The input current of switching capacity conversion chip, the output electric current of switching capacity conversion chip, switching capacity convert core
Electric current in piece on internal switch pipe.
In a kind of design in the cards, switching capacity conversion chip is also used to according to the first of terminal handler the control
System instruction adjusts current threshold.
In a kind of design in the cards, switching capacity conversion chip is also used to according to the second of terminal handler the control
System instruction is in pass-through state.
According to the second aspect of an embodiment of the present disclosure, a kind of terminal is provided characterized by comprising above-mentioned first aspect
The wireless charging receiver of any one.
In a kind of design in the cards, terminal further include: processor；
Switching capacity conversion chip, is also used to detection path electric current, and passage current be greater than or equal to current threshold with
When the sum of first current offset amount, control switch capacitor conversion chip enters current-limit mode, and the first current offset amount is greater than or waits
In 0, and it is less than current threshold；
Processor, for exporting the first control instruction for adjusting current threshold according to current desired passage current；
Switching capacity conversion chip is also used to adjust current threshold according to the first control instruction.
In a kind of design in the cards, processor is also used to the internal switch pipe according to switching capacity conversion chip
Conducting resistance, capacitor conversion chip internal switch pipe on state or charging capacitor in switching capacity conversion chip
Charging time, control reduce the output voltage of the reception chip of wireless charging receiver.
In a kind of design in the cards, processor is also used to export when entering constant voltage charging phase for controlling
Switching capacity conversion chip is in the second control instruction of pass-through state；
Switching capacity conversion chip is also used to be in pass-through state according to the second control instruction.
According to the third aspect of an embodiment of the present disclosure, a kind of charging system is provided, comprising: wireless charging emitter, electricity
The wireless charging receiver of any one of pond and above-mentioned first aspect.
In a kind of design in the cards, charging system further include: processor；
Switching capacity conversion chip, is also used to detection path electric current, and passage current be greater than or equal to current threshold with
When the sum of first current offset amount, control switch capacitor conversion chip enters current-limit mode, and the first current offset amount is greater than or waits
In 0, and it is less than current threshold；
Processor, for exporting the first control instruction for adjusting current threshold according to current desired passage current；
Switching capacity conversion chip is also used to adjust current threshold according to the first control instruction.
In a kind of design in the cards, processor is also used to the internal switch pipe according to switching capacity conversion chip
Conducting resistance, capacitor conversion chip internal switch pipe on state or charging capacitor in switching capacity conversion chip
Charging time, control reduce the output voltage of the reception chip of wireless charging receiver.
In a kind of design in the cards, processor is also used to export when entering constant voltage charging phase for controlling
Switching capacity conversion chip is in the second control instruction of pass-through state；
Switching capacity conversion chip is also used to be in pass-through state according to the second control instruction.
In a kind of design in the cards, wireless charging emitter includes: charger, transmitting chip and emission lines
Circle；The input terminal and charger of transmitting chip couple, and the output end and transmitting coil of transmitting chip couple；
Transmitting chip, the voltage of the DC power supply for being exported based on control protocol and charger communication, control charger,
And DC power supply is converted into AC power source；
Transmitting coil, for AC power source to be converted into alternating magnetic field.
Wireless charging receiver, charging system and the terminal that the disclosure provides, couple wireless charging by receiving coil
The alternating magnetic field of the transmitting coil of emitter obtains AC power source, receives chip for the AC power source and is converted to the first direct current
Power supply, switching capacity conversion chip are based on the first DC power supply and export the second DC power supply, and are electricity based on the second DC power supply
Pond charging, the voltage of the second DC power supply is lower than the voltage of the first DC power supply, and the electric current of the second DC power supply is higher than first
The electric current of DC power supply realizes the switching capacity conversion chip high using transfer efficiency, thus improve charge power and
Charge efficiency.Also, the output voltage of wireless charging emitter is higher, and what charge efficiency improved is more obvious.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is a kind of block diagram of wireless charging receiver shown according to an exemplary embodiment；
Fig. 2A and Fig. 2 B is that a kind of conversion process of switching capacity conversion chip shown according to an exemplary embodiment is shown
It is intended to；
Fig. 3 is a kind of block diagram of the wireless charging receiver shown according to another exemplary embodiment；
Fig. 4 is a kind of block diagram of the wireless charging receiver shown according to a further exemplary embodiment；
Fig. 5 A and Fig. 5 B are a kind of waveform diagrams shown according to an exemplary embodiment；
A kind of Fig. 6 and Fig. 7 schematic diagram of wireless charging receiver shown according to an exemplary embodiment；
Fig. 8 is the block diagram of terminal 800 shown according to an exemplary embodiment；
Fig. 9 is the schematic diagram of battery charging shown according to an exemplary embodiment；
Figure 10 is the schematic diagram of charging system shown according to an exemplary embodiment.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
Fig. 1 is a kind of block diagram of wireless charging receiver shown according to an exemplary embodiment.As shown in Figure 1, this
The wireless charging receiver 10 of embodiment may include receiving coil 11, receive chip 12 and switching capacity conversion chip 13；
Receiving coil 11, the alternating magnetic field of the transmitting coil for coupling wireless charging emitter, obtains AC power source；Receive chip
12 input terminal and receiving coil 11 couples, and receives the output end of chip 12 and the input terminal coupling of switching capacity conversion chip 13
It connects, for AC power source to be converted to the first DC power supply；The output end and battery of switching capacity conversion chip 13 couple, and are used for
The second DC power supply is exported based on the first DC power supply, and is battery charging based on the second DC power supply, the second DC power supply
Voltage is lower than the voltage of the first DC power supply, and the electric current of the second DC power supply is higher than the electric current of the first DC power supply.
Specifically, receiving coil 11 couples the alternating magnetic field of the transmitting coil of wireless charging emitter, alternating current is obtained
Source receives chip 12 for the AC power source and is converted to the first DC power supply, and switching capacity conversion chip 13 is based on the first direct current
Source exports the second DC power supply, and is battery charging based on the second DC power supply, and the voltage of the second DC power supply is straight lower than first
The voltage in galvanic electricity source, and the electric current of the second DC power supply is higher than the electric current of the first DC power supply.
Wherein, coupling, which can specifically include, is directly connected to and is indirectly connected with.
Wherein, coil 11, which is specifically as follows, can couple alternating magnetic field, obtain any type coil of AC power source.
Wherein, receiving chip 12 specifically can obtain any of DC power supply by rectifying to AC power source
Chip.
Wherein, switching capacity conversion chip 13 is based on the first DC power supply and exports the second DC power supply, i.e. switching capacity turns
Changing chip reduces the voltage for receiving the first DC power supply of chip output, and increases the electric current of the first DC power supply, at this point it is possible to
Think that switching capacity conversion chip is in running order.In general, can be configured by the external pin of switching capacity conversion chip
Switching capacity conversion chip is in pass-through state or open-circuit condition, further, can pass through other chips, such as power management
Chip (Power Management Integrated Circuit, PMIC), processor or single-chip microcontroller etc. control capacitor conversion
Chip is in running order.The concrete mode in running order for other chip controls switching capacity conversion chips, this public affairs
It opens and is not construed as limiting, for example, other chips can pass through I2C agreement is sent to switching capacity conversion chip for control switch electricity
Hold the in running order instruction of conversion chip.
Wherein, switching capacity conversion chip 13 is to realize drop voltage by switch control capacitor charge and discharge and rise electric current
Chip.Optionally, switching capacity conversion chip can be 1/n switching capacity conversion chip, and n can be 1.5,2 or 3 etc..
Wherein, the conversion process of switching capacity conversion chip 13 can be divided into first stage Φ 1 and second stage Φ 2, and two
A stage.For first stage Φ 1, as shown in Figure 2 A, internal switch pipe S1, S3, S5 and S7 conducting, capacitor CF1 charging, capacitor
CF2 electric discharge, current direction can be as shown in the arrow in Fig. 2A.For second stage Φ 2, as shown in Figure 2 B, internal switch pipe
S2, S4, S6 and S8 conducting, capacitor CF1 electric discharge, capacitor CF2 charging, current direction can be as indicated by arrows in fig. 2b.So
It switchs repeatedly, VOUT=1/nVIN, the output of IOUT=n*IIN may be implemented.It should be noted that in Fig. 2A and Fig. 2 B,
C1P, C1N, GND, C2P, C2N, VOUT and VIN are PIN foot, and CB is capacitor.
It should be noted that the transfer efficiency of switching capacity conversion chip 13 is high, 98% can achieve, and BUCK circuit
Transfer efficiency it is lower, and BUCK circuit is when input voltage differs bigger with output voltage, generates heat more serious, transfer efficiency is got over
It is low.Therefore, realize that drop voltage rises electric current by switching capacity conversion chip, it, can be with compared with realizing decompression by BUCK circuit
Improve charge efficiency.Also, in order to realize high-power charging, the output voltage of wireless charging emitter and the input electricity of battery
Pressure difference is bigger, and the efficiency of BUCK circuit is lower, therefore under high-power charging, and switching capacity conversion chip improves charge efficiency
Effect it is more obvious.
Wireless charging receiver provided in this embodiment couples the transmitting of wireless charging emitter by receiving coil
The alternating magnetic field of coil obtains AC power source, receives chip for the AC power source and is converted to the first DC power supply, switching capacity turns
It changes chip and is based on the first DC power supply the second DC power supply of output, and be battery charging, the second direct current based on the second DC power supply
The voltage of power supply is lower than the voltage of the first DC power supply, and the electric current of the second DC power supply is higher than the electric current of the first DC power supply,
The switching capacity conversion chip high using transfer efficiency is realized, to improve charge power and charge efficiency.Also, nothing
The output voltage of line charge electricity emitter is higher, and what charge efficiency improved is more obvious.
Fig. 3 is a kind of block diagram of the wireless charging receiver shown according to another exemplary embodiment.As shown in figure 3,
On the basis of embodiment shown in Fig. 1, switching capacity conversion chip 13 includes first order switching capacity conversion chip 131 and second
Grade switching capacity conversion chip 132；Wireless charging receiver further include: power management chip PMIC14, such as BUCK circuit.
Wherein, the input terminal of first order switching capacity conversion chip 131 and reception chip 12 couple, first order switching capacity conversion chip
131 output end is coupled with the input terminal of second level switching capacity conversion chip 132 and PMIC14 respectively, second level switching capacity
The output end of conversion chip 132 and PMIC14 are coupled with battery.First order switching capacity conversion chip 131, for based on the
Three DC power supplies export the second DC power supply, and are charged based on the second DC power supply using the first electric current as battery, and second is straight
The voltage in galvanic electricity source is lower than the voltage of third DC power supply, and the electric current of the second DC power supply is higher than the electric current of third DC power supply
(that is, reducing the voltage for receiving the first DC power supply that chip 12 exports, and increasing the electric current of the first DC power supply)；It opens the second level
Powered-down appearance conversion chip 132, for exporting the second DC power supply based on third DC power supply, and based on the second DC power supply with the
One electric current is that battery charges, and the voltage of the second DC power supply is lower than the voltage of third DC power supply, and the second DC power supply
Electric current be higher than third DC power supply electric current (that is, reduce first order switching capacity conversion chip 131 export third direct current
The voltage of power supply, and after increasing the electric current of third DC power supply, charge for battery)；PMIC14, for being based on the second direct current
Power supply charges using the second electric current as battery, and the second electric current is less than the first electric current.Here, it charges by battery of the first electric current
It can be understood as constant-current charge, can be understood as constant-voltage charge by battery charging of the second electric current.
Specifically, PMIC14 does not work when needing to carry out high-power charging, second level switching capacity conversion chip 132
Work, realizes high-power charging by second level switching capacity conversion chip 132.When needing to carry out small-power charging,
PMIC14 work, second level switching capacity conversion chip 132 do not work, and realize small-power charging by PMIC14.Optionally, may be used
To control PMIC and the work of second level switching capacity conversion chip 132 by the processor of terminal or not work.Specifically, can
To realize constant-current charging phase by first order switching capacity conversion chip+second level switching capacity conversion chip；It can be by first
Grade switching capacity conversion chip+PMIC, realizes constant voltage charging phase.Here, PMIC can be used as charging chip.It needs to illustrate
It is that, when small-power charging, such as less than 5W, switching capacity conversion chip may be at pass-through state, such as first order switch electricity
Hold conversion chip and be in pass-through state, second level switching capacity conversion chip is in open-circuit condition.
As shown in figure 4, wireless charging receiver can also be provided in addition to charging for battery for the software and hardware system of terminal
Power supply.When terminal charges to battery by wireless charging receiver, the load dl of software and hardware system usually has fluctuation, can
It can cause IOUTSuddenly change Δ I, so as to cause IRECVariation is (for example, when including two-stage switching capacity conversion chip and every level-one
When switching capacity conversion chip is 1/2 switching capacity conversion chip, IRECVariable quantity have 1/4 Δ I), work as IRECWhen changing greatly,
The problem of will lead to influence the communication of wireless charging system, such as the communication of wireless charging system can be caused to disconnect.Example
Such as, as shown in Figure 5A, 51 I is indicatedOUTWaveform, 52 indicate IOUTFluctuation causes VRECThe waveform of fluctuation.
In addition, as shown in Figure 5 B, when carrying out wireless charging, the transmitting chip in wireless charging emitter needs and nothing
Reception chip real time communication in line charging receiver, and can be in VRECThe very big ripple of upper superposition amplitude, causes electric current
IOUTWith communication frequent fluctuation, it be easy to cause the problem of overcharging.For example, it is assumed that VRECUpper punching reaches nearly 400mV, opens through 2 grade 1/2
Powered-down appearance conversion chip shows output VOUTOn ripple just have 100mV, if the internal resistance of cell is the Europe 100m, IOUTMoment
Fluctuation is exactly 1 ampere (A).
As can be seen that above-mentioned fluctuation and V due to software and hardware system loadRECFluctuation the problems caused by can be with
It shows the variation of passage current, therefore, in order to solve above-mentioned two problems, improves the stability of charging process, optionally, open
Powered-down appearance conversion chip 13 is also used to detection path electric current, and is greater than or equal to current threshold and the first electricity in the passage current
When flowing the sum of offset, control switch capacitor conversion chip 13 enters current-limit mode, the first current offset amount be greater than or equal to 0 and
Less than current threshold.Here, current-limit mode refers to the electric current of limit switch capacitor conversion chip, specifically, can be with limit switch
The input current of capacitor conversion chip, the electric current for exporting electric current and/or internal switch pipe.Switching capacity enters current-limit mode, can
To reduce passage current, to avoid showing as the above problem of passage current mutation.
Specifically, can be indicated logical when passage current is greater than or equal to the sum of current threshold and the first current offset amount
Road current anomaly may will affect the communication of wireless charging system or cause to overcharge；When passage current is less than current threshold and the
It when the difference of two current offset amounts, can indicate that passage current is normal, will not influence the communication of wireless charging system or cause to overcharge.
Optionally, passage current may include any one in following:
The input current of switching capacity conversion chip 13, the output electric current of switching capacity conversion chip 13, switching capacity turn
Change the electric current in chip 13 on internal switch pipe.
Optionally, when switching capacity conversion chip includes that first order switching capacity conversion chip and second level switching capacity turn
When changing chip, it can be switched by any one in first order switching capacity conversion chip and second level switching capacity conversion chip
Capacitor conversion chip detection path electric current, and it is greater than or equal to the sum of current threshold and the first current offset amount in passage current
When, itself is controlled into current-limit mode.
Further alternative, when by first order switching capacity conversion chip detection path electric current, passage current input can
To include any one in following: the input current (I of first order switching capacity conversion chip 131REC), first order switch electricity
Hold the output electric current (I of conversion chip 131BUS), the main line electricity of second level switching capacity conversion chip 132 and PMIC parallel output
Flow IOUT, electric current in first order switching capacity conversion chip 131 on internal switch pipe.When by second level switching capacity conversion core
When piece detection path electric current, passage current input may include any one in following: first order switching capacity conversion chip
131 input current, the output electric current of first order switching capacity conversion chip 131, second level switching capacity conversion chip 132 with
The main line electric current I of PMIC parallel outputOUT, electric current in second level switching capacity conversion chip 132 on internal switch pipe.
Optionally, switching capacity conversion chip 131 is also used to be less than the current threshold and the second electric current in the passage current
When the difference of offset, controls the switching capacity conversion chip and exit current-limit mode, the second current offset amount is more than or equal to 0 and small
In current threshold.It should be noted that it is opposite with above-mentioned entrance current-limit mode to exit current-limit mode here.
Optionally, the first current offset amount can be equal to the second current offset amount.Pass through the first current offset amount and second
Current offset amount, and the first current offset amount and the second current offset amount are all larger than 0, can exist repeatedly to avoid at current threshold
Switch into current-limit mode and exiting between current-limit mode.
Optionally, switching capacity conversion chip 13 can leading by the internal switch pipe of increase switching capacity conversion chip
The resistance that is powered enters current-limit mode.Optionally, in order to improve charge efficiency, switching capacity conversion chip is internal in work process
The conducting resistance of switching tube is usually minimum value, when passage current is greater than or equal to current threshold and the first current offset amount,
Switching capacity conversion chip increases the conducting resistance of each internal switch pipe immediately, to enter current-limit mode, to reduce access electricity
Stream.Further, when passage current is less than the difference of current threshold and the second current offset amount, switching capacity conversion chip is immediately
The conducting resistance of each internal switch pipe is decreased to minimum value, to exit current-limit mode, to increase passage current.For example, can
To set IRECCurrent threshold be 1.1A, as software and hardware system load (or VREC) fluctuation, lead to IRECMore than or equal to 1.1A
When, switching capacity chip makes feedback immediately in several switch periods, into current-limit mode, reduces each internal switch pipe
Conducting resistance, response time are generally delicate interior tens.As software and hardware system load (or VREC) fluctuation disappear when, switch electricity
Hold conversion chip and exit current-limit mode, the conducting resistance of internal switch pipe restores minimum.
Optionally, internal switch pipe is specifically as follows Metal-Oxide Semiconductor field effect transistor (Metal-Oxide-
Semiconductor Field-Effect Transistor, MOSFET).
It should be noted that the amplitude of accommodation of the conducting resistance for switching capacity conversion chip internal switch pipe, this public affairs
Opening can be not construed as limiting.It optionally, can be fixed amplitude, or can also be according to the difference journey of passage current and current threshold
Degree, determines the amplitude of accommodation.
Optionally, switching capacity conversion chip 13 can be charged by disconnecting in switching capacity conversion chip to charging capacitor
Internal switch pipe, or charging capacitor is parallel in the output of switching capacity conversion chip and carries out electric discharge and enters current limliting mould
Formula.Here, charging capacitor is specifically as follows CF1 and CF2 in Fig. 2A and Fig. 2 B.When being in first stage Φ 1, switch is disconnected
The internal switch pipe to charge in capacitor conversion chip to charging capacitor, which is specifically as follows, disconnects S1 and S3；Charging capacitor is parallel to
The output of switching capacity conversion chip, which is specifically as follows, to be disconnected S1 and S3 and S6 and S8 is connected.When being in second stage Φ 2, break
It opens the internal switch pipe to charge in switching capacity conversion chip to charging capacitor and is specifically as follows disconnection S2 and S4；By charging capacitor
The output for being parallel to switching capacity conversion chip, which is specifically as follows, to be disconnected S2 and S4 and S5 and S7 is connected.Specifically, when access electricity
When stream is greater than or equal to the sum of current threshold and the first current offset amount, switching capacity conversion chip disconnects switching capacity immediately and turns
The internal switch pipe to charge in chip to charging capacitor is changed, or charging capacitor is parallel to the output of switching capacity conversion chip
On discharge, with enter current-limit mode, to reduce passage current.Further, when passage current be less than current threshold with
When the difference of the second current offset amount, switching capacity conversion chip restore normal capacitor charge and discharge switching process (for example, Fig. 2A and
The switching process repeatedly of the internal switch pipe corresponding with 2 two stages of Φ of Φ 1 in Fig. 2 B) it will continue to again, to exit current limliting
Mode, to increase passage current.
It optionally, is by clock according to certain frequency due to the internal switch pipe of switching capacity conversion chip, centainly
Logical sequence carries out open and close, therefore by carrying out hop cycle control to switching capacity conversion chip, may be implemented to disconnect switch
The internal switch pipe to charge in capacitor conversion chip to charging capacitor；Alternatively, charging capacitor is parallel to switching capacity conversion core
It discharges in the output of piece.Specifically, as shown in fig. 6, working as IOUTMore than shown in dotted line when current threshold, when corresponding
The clock period (that is, the clock cycle shown in dotted line) disconnects the inside charged in switching capacity conversion chip to charging capacitor
Switching tube；It discharges alternatively, charging capacitor is parallel in the output of switching capacity conversion chip.Further, work as IOUTNot
More than when current threshold, in the corresponding clock control period, switching capacity conversion chip restores normal capacitor shown in dotted line
Charge and discharge switch process.It should be noted that in Fig. 6 by taking the first current offset amount and the second current offset amount are 0 as an example.
Optionally, switching capacity conversion chip 13 can pass through the charging of charging capacitor in reduction switching capacity conversion chip
Time enters current-limit mode.Here, charging capacitor is specifically as follows CF1 and CF2 in Fig. 2A and Fig. 2 B, breaks and reduces switching capacity
The charging time of charging capacitor is specifically as follows the charging time for reducing CF1 and CF2 in conversion chip.Specifically, when access electricity
When stream is greater than or equal to the sum of current threshold and the first current offset amount, switching capacity conversion chip reduces switching capacity immediately and turns
The charging time of charging capacitor in chip is changed, to enter current-limit mode, to reduce passage current.Further, when access electricity
When stream is less than the difference of current threshold and the second current offset amount, switching capacity conversion chip restores the charging of normal charging capacitor
Time, to exit current-limit mode, to increase passage current.
It optionally, is by clock according to certain frequency due to the internal switch pipe of switching capacity conversion chip, centainly
Logical sequence carries out open and close, therefore the duty ratio by reducing clock, may be implemented to reduce and fill in switching capacity conversion chip
The charging time of capacitor.Specifically, as shown in fig. 7, working as IOUTMore than when current threshold, reduction corresponds to clock shown in dotted line
The clock duty cycle in period is controlled, i.e. the reduction charging time, increases discharge time.Further, work as IOUTIt is less than shown in dotted line
Current threshold when, restore the clock duty cycle in corresponding clock control period.It should be noted that inclined with the first electric current in Fig. 7
The amount of setting and the second current offset amount are for 0.
Optionally, switching capacity conversion chip 13 is also used to adjust electric current according to the first control instruction of terminal handler
Threshold value.Specifically, desired passage current can be different in the different charging stages of battery, in order to realize more precise control,
Current threshold can be adjusted according to this.Specifically, current threshold can be bigger when desired passage current is bigger；When desired
Passage current is got over hour, and current threshold can be smaller.
Optionally, switching capacity conversion chip 13 can also be in straight-through according to the second control instruction of terminal handler
State.Specifically, not needing to increase electric current, therefore can control switching capacity conversion chip when being in constant-voltage charge state
In pass-through state.For 1/2 switching capacity conversion chip shown in Fig. 2A and Fig. 2 B, switching capacity conversion chip is in straight-through
State is specifically as follows S1, S2, S5 and S6 and is both turned on, and S3, S4, S7 and S8 are disconnected.When switching capacity conversion chip is in straight
When logical state, VOUT can be equal to VIN, and IOUT can be equal to IIN.It should be noted that when switching capacity conversion chip 13 wraps
When including first order switching capacity conversion chip 131 and second level switching capacity conversion chip 132, it specifically can control the first order and open
Powered-down appearance conversion chip 131 is in pass-through state.
In addition, above by the output electric current of switching capacity conversion chip detection charging path, and according to charging path
Output electric current enters current-limit mode, and higher response speed may be implemented.
Wireless charging receiver provided in this embodiment, first order switching capacity conversion chip are based on the first DC power supply
Third DC power supply is exported, the voltage of third DC power supply is lower than the voltage of the first DC power supply, and the electricity of third DC power supply
Stream is higher than the electric current of the first DC power supply, and second level switching capacity conversion chip is based on third DC power supply and exports the second direct current
Source, and charged based on the second DC power supply using the first electric current as battery, the voltage of the second DC power supply is lower than third direct current
The voltage of power supply, and the electric current of the second DC power supply be higher than third DC power supply electric current, PMIC be based on the second DC power supply with
Second electric current is that battery charges, and the second electric current is less than the first electric current, in the base for the charge efficiency for improving high-power charging
On plinth, it may further realize that small-power charges.
Fig. 8 is the block diagram of terminal 800 shown according to an exemplary embodiment.For example, terminal 800 can be mobile electricity
Words, computer, digital broadcast equipment, messaging devices, game console, tablet device, Medical Devices, body-building equipment are a
Personal digital assistant etc..
Referring to Fig. 8, terminal 800 may include following one or more components: processing component 802, memory 804, power supply
Component 806, multimedia component 808, audio component 810, the interface 812 of input/output (I/O), sensor module 814, and
Communication component 816.
The integrated operation of the usual controlling terminal 800 of processing component 802, such as with display, telephone call, data communication, phase
Machine operation and record operate associated operation.Processing component 802 may include that one or more processors 820 refer to execute
It enables, to perform all or part of the steps of the methods described above.In addition, processing component 802 may include one or more modules, just
Interaction between processing component 802 and other assemblies.For example, processing component 802 may include multi-media module, it is more to facilitate
Interaction between media component 808 and processing component 802.
Memory 804 is configured as storing various types of data to support the operation in terminal 800.These data are shown
Example includes the instruction of any application or method for operating in terminal 800, contact data, and telephone book data disappears
Breath, picture, video etc..Memory 804 can be by any kind of volatibility or non-volatile memory device or their group
It closes and realizes, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM) is erasable to compile
Journey read-only memory (EPROM), programmable read only memory (PROM), read-only memory (ROM), magnetic memory, flash
Device, disk or CD.
Power supply module 806 provides electric power for the various assemblies of terminal 800.Power supply module 806 may include power management system
System, one or more power supplys and other with for terminal 800 generate, manage, and distribute the associated component of electric power.
Multimedia component 808 includes the screen of one output interface of offer between the terminal 800 and user.Some
In embodiment, screen may include liquid crystal display (LCD) and touch panel (TP).If screen includes touch panel, screen
It may be implemented as touch screen, to receive input signal from the user.Touch panel includes one or more touch sensors
To sense the gesture on touch, slide, and touch panel.The touch sensor can not only sense the side of touch or sliding action
Boundary, but also detect duration and pressure relevant to the touch or slide.In some embodiments, multimedia component
808 include a front camera and/or rear camera.When terminal 800 is in operation mode, such as screening-mode or video screen module
When formula, front camera and/or rear camera can receive external multi-medium data.Each front camera and postposition are taken the photograph
As head can be a fixed optical lens system or have focusing and optical zoom capabilities.
Audio component 810 is configured as output and/or input audio signal.For example, audio component 810 includes a Mike
Wind (MIC), when terminal 800 is in operation mode, when such as call mode, recording mode, and voice recognition mode, microphone is matched
It is set to reception external audio signal.The received audio signal can be further stored in memory 804 or via communication set
Part 816 is sent.In some embodiments, audio component 810 further includes a loudspeaker, is used for output audio signal.
I/O interface 812 provides interface between processing component 802 and peripheral interface module, and above-mentioned peripheral interface module can
To be keyboard, click wheel, button etc..These buttons may include, but are not limited to: home button, volume button, start button and lock
Determine button.
Sensor module 814 includes one or more sensors, and the state for providing various aspects for terminal 800 is commented
Estimate.For example, sensor module 814 can detecte the state that opens/closes of terminal 800, the relative positioning of component, such as the group
Part is the display and keypad of terminal 800, and sensor module 814 can also detect 800 1 components of terminal 800 or terminal
Position change, the existence or non-existence that user contacts with terminal 800, the temperature in 800 orientation of terminal or acceleration/deceleration and terminal 800
Degree variation.Sensor module 814 may include proximity sensor, be configured to detect without any physical contact attached
The presence of nearly object.Sensor module 814 can also include optical sensor, such as CMOS or ccd image sensor, for being imaged
It is used in.In some embodiments, the sensor module 814 can also include acceleration transducer, gyro sensor,
Magnetic Sensor, pressure sensor or temperature sensor.
Communication component 816 is configured to facilitate the communication of wired or wireless way between terminal 800 and other equipment.Terminal
800 can access the wireless network based on communication standard, such as WiFi, 2G or 3G or their combination.In an exemplary implementation
In example, communication component 816 receives broadcast singal or broadcast related information from external broadcasting management system via broadcast channel.
In one exemplary embodiment, which further includes near-field communication (NFC) module, to promote short range communication.Example
Such as, NFC module can be based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra wide band (UWB) technology,
Bluetooth (BT) technology and other technologies are realized.
In the exemplary embodiment, terminal 800 can be believed by one or more application specific integrated circuit (ASIC), number
Number processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array
(FPGA), controller, microcontroller, microprocessor or other electronic components are realized.
In the exemplary embodiment, a kind of non-transitorycomputer readable storage medium including instruction, example are additionally provided
It such as include the memory 804 of instruction.For example, the non-transitorycomputer readable storage medium can be ROM, random access memory
Device (RAM), CD-ROM, tape, floppy disk and optical data storage devices etc..
Wherein, terminal 800 may include wireless charging receiver, the wireless charging receiver include: receiving coil,
Receive chip and switching capacity conversion chip；Receiving coil, the alternation of the transmitting coil for coupling wireless charging emitter
Magnetic field obtains AC power source；The input terminal and receiving coil for receiving chip couple, and the output end and switching capacity for receiving chip turn
The input terminal coupling for changing chip, for AC power source to be converted to the first DC power supply；The output end of switching capacity conversion chip
It is coupled with battery, for exporting the second DC power supply based on the first DC power supply, and is battery charging based on the second DC power supply,
The voltage of second DC power supply is lower than the voltage of the first DC power supply, and the electric current of the second DC power supply is higher than the first DC power supply
Electric current.
In a kind of design in the cards, switching capacity conversion chip includes first order switching capacity conversion chip and
Secondary switch capacitor conversion chip；Wireless charging receiver further include: power management chip PMIC；
The input terminal of first order switching capacity conversion chip and reception chip coupling, first order switching capacity conversion chip
Output end is coupled with the input terminal of second level switching capacity conversion chip and power management chip respectively, and second level switching capacity turns
The output end for changing chip and power management chip is coupled with battery；
First order switching capacity conversion chip, for exporting third DC power supply, third direct current based on the first DC power supply
The voltage of power supply is lower than the voltage of the first DC power supply, and the electric current of third DC power supply is higher than the electric current of the first DC power supply；
Second level switching capacity conversion chip, for exporting the second DC power supply based on third DC power supply, and based on the
Two DC power supplies charge using the first electric current as battery, and the voltage of the second DC power supply is lower than the voltage of third DC power supply,
And second DC power supply electric current be higher than third DC power supply electric current；
Power management chip, for being charged based on the second DC power supply using the second electric current as battery, and the second electric current
Less than the first electric current.
In a kind of design in the cards, switching capacity conversion chip is also used to detection path electric current, and in access electricity
When stream is greater than or equal to the sum of current threshold and the first current offset amount, control switch capacitor conversion chip enters current-limit mode,
First current offset amount is greater than or equal to 0, and is less than current threshold.
In a kind of design in the cards, switching capacity conversion chip specifically includes following for entering current-limit mode
At least one of:
Increase the conducting resistance of the internal switch pipe of switching capacity conversion chip；Alternatively, disconnecting switching capacity conversion chip
In to charging capacitor charge internal switch pipe；Alternatively, the output that charging capacitor is parallel to switching capacity conversion chip is enterprising
Row electric discharge；Alternatively, reducing the charging time of charging capacitor in switching capacity conversion chip.
In a kind of design in the cards, switching capacity conversion chip is also used to be less than current threshold in passage current
And when the difference of the second current offset amount, control switch capacitor conversion chip exits current-limit mode, the second current offset amount be greater than or
Greater than 0, and it is less than current threshold.
In a kind of design in the cards, passage current includes any one in following:
The input current of switching capacity conversion chip, the output electric current of switching capacity conversion chip, switching capacity convert core
Electric current in piece on internal switch pipe.
In a kind of design in the cards, switching capacity conversion chip is also used to according to the first of terminal handler the control
System instruction adjusts current threshold.
Optionally, in order to improve charge efficiency, optimize power transmission state, processor can be with real-time detection passage current
(such as IREC、IBUSOr IOUT) and voltage (VREC、VBUSOr VOUT), and wireless charging emitter and wireless charging are received in real time
Modules (for example, switching capacity conversion chip) in device are controlled, so that current power is maximum, efficiency highest is filled
Electricity is more stable.
Specifically, cell voltage can gradually rise when battery is in constant-current charging phase, enter the electric current of battery in this way
It will gradually decrease, after processor detects that passage current reduces at this time, can control charger and improve output voltage, so that filling
Electric current keeps maximum rating.When battery enters constant voltage charging phase, battery current is gradually reduced, and processor can be controlled at this time
Charger processed reduces voltage output or control switch chip operation in pass-through state improves whole charge efficiency.
In a kind of design in the cards, processor is also used to be exported according to current desired passage current for adjusting
First control instruction of current threshold value；Switching capacity conversion chip is also used to adjust current threshold according to the first control instruction.
Specifically, as shown in figure 9, battery charging is generally divided into constant voltage charging phase and constant-current charging phase, also, not
Different with period passage current, in order to realize more precise control, processor can be according to current desired passage current tune
Current threshold value.
In a kind of design in the cards, processor is also used to export when entering constant voltage charging phase for controlling
Switching capacity conversion chip is in the second control instruction of pass-through state；Switching capacity conversion chip is also used to according to the second control
System instruction is in pass-through state.Turn specifically, processor can be sent to switching capacity conversion chip for trigger switch capacitor
The trigger signal that chip is in pass-through state is changed, switching capacity forwarding chip can be in pass-through state according to the trigger signal.
In a kind of design in the cards, when switching capacity conversion chip, by increasing switching capacity conversion chip
The mode of the conducting resistance of internal switch pipe, when into current-limit mode, processor is also used to according to switching capacity conversion chip
The conducting resistance of internal switch pipe, control reduce the output voltage for receiving chip.Specifically, processor can be according to reception chip
Output voltage and switching capacity conversion chip internal switch pipe conducting resistance, judge the interior of switching capacity conversion chip
Whether the conducting resistance of portion's switching tube is excessive.It, can when the conducting resistance of the internal switch pipe of switching capacity conversion chip is excessive
The output voltage for receiving chip is reduced to control, such as the output voltage for receiving chip is reduced into 20mv.Further, due to drop
The low output voltage V for receiving chipREC, therefore IRECAlso it reduces, in order to realize identical charge power, therefore switching capacity is converted
Chip can reduce the conducting resistance of its internal switch pipe.
In a kind of design in the cards, when switching capacity conversion chip, by disconnecting in switching capacity conversion chip
The internal switch pipe to charge to charging capacitor is put alternatively, charging capacitor is parallel in the output of switching capacity conversion chip
The mode of electricity, when into current-limit mode, processor is also used to the on state of the internal switch pipe according to capacitor conversion chip,
Control reduces the output voltage of the reception chip of wireless charging receiver.Specifically, processor can be according to reception chip
The on state of the internal switch pipe of output voltage and capacitor conversion chip, judges whether switching capacity conversion chip should move back
Current-limit mode out.When switching capacity conversion chip should exit current-limit mode, can control reduces the output electricity for receiving chip
Pressure, such as the output voltage for receiving chip is reduced into 20mv.Further, the output voltage V of chip is received due to reducingREC, because
This IRECAlso it reduces, in order to realize identical charge power, therefore switching capacity conversion chip can exit current-limit mode.
In a kind of design in the cards, when switching capacity conversion chip, by reducing in switching capacity conversion chip
The mode in the charging time of charging capacitor, when into current-limit mode, processor is also used to fill according in switching capacity conversion chip
The charging time of capacitor, control reduce the output voltage of the reception chip of wireless charging receiver.Specifically, processor can
To judge switching capacity according to the charging time of charging capacitor in the output voltage and switching capacity conversion chip for receiving chip
Whether conversion chip should exit current-limit mode.When switching capacity conversion chip should exit current-limit mode, drop can control
The low output voltage for receiving chip, such as the output voltage for receiving chip is reduced into 20mv.Further, core is received due to reducing
The output voltage V of pieceREC, therefore IRECAlso it reduces, in order to realize identical charge power, therefore switching capacity conversion chip can be with
Exit current-limit mode.
The disclosure also provides a kind of charging system, including wireless charging emitter, battery and wireless charging receive dress
It sets；Wherein, wireless charging receiver includes:
Receiving coil receives chip and switching capacity conversion chip；Receiving coil, for coupling wireless charging emitter
Transmitting coil alternating magnetic field, obtain AC power source；
The input terminal and receiving coil for receiving chip couple, and receive the defeated of the output end of chip and switching capacity conversion chip
Enter end coupling, for AC power source to be converted to the first DC power supply；
The output end and battery of switching capacity conversion chip couple, for exporting the second direct current based on the first DC power supply
Source, and be that battery charges based on the second DC power supply, the voltage of the second DC power supply lower than the first DC power supply voltage, and the
The electric current of two DC power supplies is higher than the electric current of the first DC power supply.
In a kind of design in the cards, switching capacity conversion chip includes first order switching capacity conversion chip and
Secondary switch capacitor conversion chip；Wireless charging receiver further include: power management chip PMIC；
The input terminal of first order switching capacity conversion chip and reception chip coupling, first order switching capacity conversion chip
Output end is coupled with the input terminal of second level switching capacity conversion chip and power management chip respectively, and second level switching capacity turns
The output end for changing chip and power management chip is coupled with battery；
First order switching capacity conversion chip, for exporting third DC power supply, third direct current based on the first DC power supply
The voltage of power supply is lower than the voltage of the first DC power supply, and the electric current of third DC power supply is higher than the electric current of the first DC power supply；
Second level switching capacity conversion chip, for exporting the second DC power supply based on third DC power supply, and based on the
Two DC power supplies charge using the first electric current as battery, and the voltage of the second DC power supply is lower than the voltage of third DC power supply,
And second DC power supply electric current be higher than third DC power supply electric current；
Power management chip, for being charged based on the second DC power supply using the second electric current as battery, and the second electric current
Less than the first electric current.
In a kind of design in the cards, switching capacity conversion chip is also used to detection path electric current, and in access electricity
When stream is greater than or equal to the sum of current threshold and the first current offset amount, control switch capacitor conversion chip enters current-limit mode,
First current offset amount is greater than or is greater than 0, and is less than current threshold.
In a kind of design in the cards, switching capacity conversion chip specifically includes following for entering current-limit mode
At least one of:
Increase the conducting resistance of the internal switch pipe of switching capacity conversion chip；Alternatively, disconnecting switching capacity conversion chip
In to charging capacitor charge internal switch pipe；Alternatively, the output that charging capacitor is parallel to switching capacity conversion chip is enterprising
Row electric discharge；Alternatively, reducing the charging time of charging capacitor in switching capacity conversion chip.
In a kind of design in the cards, switching capacity conversion chip is also used to be less than current threshold in passage current
And when the difference of the second current offset amount, control switch capacitor conversion chip exits current-limit mode, the second current offset amount be greater than or
Greater than 0, and it is less than current threshold.
In a kind of design in the cards, passage current includes any one in following:
The input current of switching capacity conversion chip, the output electric current of switching capacity conversion chip, switching capacity convert core
Electric current in piece on internal switch pipe.
In a kind of design in the cards, switching capacity conversion chip is also used to detection path electric current, and in access electricity
Stream be greater than or equal to the sum of current threshold and the first current offset amount when, into current-limit mode, the first current offset amount be greater than or
Greater than 0, and it is less than current threshold；
In a kind of design in the cards, charging system further include: processor；
Processor, for exporting the first control instruction for adjusting current threshold according to current desired passage current；
Switching capacity conversion chip is also used to adjust current threshold according to the first control instruction of terminal handler.
In a kind of design in the cards, processor is also used to the internal switch pipe according to switching capacity conversion chip
Conducting resistance, capacitor conversion chip internal switch pipe on state or charging capacitor in switching capacity conversion chip
Charging time, control reduce the output voltage of the reception chip of wireless charging receiver.
In a kind of design in the cards, processor is also used to export when entering constant voltage charging phase for controlling
Switching capacity conversion chip is in the second control instruction of pass-through state；
Switching capacity conversion chip is also used to be in pass-through state according to the second control instruction of terminal handler.
It is as shown in Figure 10, optionally, wireless in the charging system by taking wireless charging receiver is as shown in Figure 4 as an example
The emitter that charges includes: charger 15, transmitting chip 16 and transmitting coil 17；The input terminal and charger 15 of transmitting chip 16
Coupling, the output end and transmitting coil 17 of transmitting chip 16 couple；Transmitting chip 16, for based on control protocol and charger 15
Communication, the voltage for the DC power supply that control charger 15 exports, and DC power supply is converted into AC power source；Transmitting coil 17,
For AC power source to be converted into alternating magnetic field.Here, it is directly coupled with transmitting chip 72 by charger 71, in wireless charging
BUCK circuit is eliminated in emitter, can be imitated to avoid due to BUCK circuit bring power consumption to further increase charging
Rate.
Optionally, control protocol can for power transmission (Power Delivery, PD), high pass (Quick Charge,
QC) 4.0, super charge protocol (Super Charge Protocol, SCP) agreement.Transmitting chip 16 passes through PD, QC4.0, SCP
Etc. agreements, directly communicated with charger 15, output voltage degree of regulation can achieve 20mV, output voltage 3V~20V with
On, power needed for can precisely adjusting rear end.In addition, can subtract since the output voltage of transmitting chip is high compared with BUCK circuit
Electric current on small coil, to reduce coil heating.
It should be noted that in Figure 10, with the concatenated capacitor of transmitting coil and with the concatenated capacitor of receiving coil,
Resonant capacitance is thought, for improving charge power.
With charge power be 20 watts (W), switching capacity conversion chip be 1/2 switching capacity conversion chip for, it is worked
Journey is as follows:
(1), transmitting chip is directly communicated with charger by agreements such as PD/QC4.0/SCP, adjusts the defeated of charger
Voltage V outDCAbout 20 volts (V).
(2), the DC voltage conversion that transmitting chip exports charger supplies transmitting coil at alternating voltage.
(3), receiving coil passes through the energy of coupling firing coil, and alternating voltage is exported and gives reception chip, receiving coil
On electric current be about 1 peace (A).
(4), DC voltage V will be exported by receiving chip after ac voltage rectifierREC, about 19V, passage current IRECAbout
1.1A, i.e. output power are 20W.
(5)、VRECV is exported through 1/2 switching capacity conversion chip of first order decompression halfBUSAbout 9V, passage current IBUSAbout
2.2A。
(6)、VBUSV is exported through 1/2 switching capacity conversion chip of second level decompression halfOUTAbout 4V, passage current IOUTAbout
4.4A。
(7)、VBUSIt can be used as auxiliary charging through PMIC, realize input and output current limliting, the functions such as trickle, small-power charging.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are wanted by right
Book is asked to point out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by appended claims
System.
Claims (17)
1. a kind of wireless charging receiver characterized by comprising receiving coil receives chip and switching capacity conversion core
Piece；The receiving coil, the alternating magnetic field of the transmitting coil for coupling wireless charging emitter, obtains AC power source；
The input terminal for receiving chip and the receiving coil couple, the output end and the switching capacity for receiving chip
The input terminal of conversion chip couples, for the AC power source to be converted to the first DC power supply；
The output end and battery of the switching capacity conversion chip couple, for straight based on first DC power supply output second
Galvanic electricity source, and be that the battery charges based on second DC power supply, the voltage of second DC power supply are lower than described the
The voltage of one DC power supply, and the electric current of second DC power supply is higher than the electric current of first DC power supply.
2. wireless charging receiver according to claim 1, which is characterized in that the switching capacity conversion chip includes
First order switching capacity conversion chip and second level switching capacity conversion chip；The wireless charging receiver further include: electricity
Source control chip PMIC；
The input terminal of the first order switching capacity conversion chip and the reception chip couple, and the first order switching capacity turns
The output end for changing chip is coupled with the input terminal of the second level switching capacity conversion chip and the power management chip respectively,
The output end of the second level switching capacity conversion chip and the power management chip is coupled with the battery；
The first order switching capacity conversion chip, it is described for exporting third DC power supply based on first DC power supply
The voltage of third DC power supply is lower than the voltage of first DC power supply, and the electric current of the third DC power supply is higher than described
The electric current of first DC power supply；
The second level switching capacity conversion chip, for exporting the second DC power supply, and base based on the third DC power supply
It is charged in second DC power supply with the first electric current for the battery, the voltage of second DC power supply is lower than described
The voltage of third DC power supply, and the electric current of second DC power supply is higher than the electric current of the third DC power supply；
The power management chip, for being charged based on second DC power supply with the second electric current for the battery, and
Second electric current is less than first electric current.
3. wireless charging receiver according to claim 1 or 2, which is characterized in that the switching capacity conversion chip,
It is also used to detection path electric current, and when the passage current is greater than or equal to the sum of current threshold and the first current offset amount,
It controls the switching capacity conversion chip and enters current-limit mode, the first current offset amount is greater than or is greater than 0, and is less than described
Current threshold.
4. wireless charging receiver according to claim 3, which is characterized in that the switching capacity conversion chip is used
Enter current-limit mode in controlling the switching capacity conversion chip, specifically include at least one of following:
Increase the conducting resistance of the internal switch pipe of switching capacity conversion chip；It is given in switching capacity conversion chip alternatively, disconnecting
The internal switch pipe of charging capacitor charging；It is put alternatively, charging capacitor is parallel in the output of switching capacity conversion chip
Electricity；Alternatively, reducing the charging time of charging capacitor in switching capacity conversion chip.
5. wireless charging receiver according to claim 3, which is characterized in that the switching capacity conversion chip, also
When for being less than the difference of the current threshold and the second current offset amount in the passage current, the switching capacity conversion is controlled
Chip exits current-limit mode, and the second current offset amount is greater than or is greater than 0, and is less than the current threshold.
6. wireless charging receiver according to claim 3, which is characterized in that the passage current includes in following
Any one:
The input current of the switching capacity conversion chip, the output electric current of the switching capacity conversion chip, the switch electricity
Hold the electric current in conversion chip on internal switch pipe.
7. wireless charging receiver according to claim 3, which is characterized in that the switching capacity conversion chip, also
For adjusting the current threshold according to the first control instruction of terminal handler.
8. wireless charging receiver according to claim 7, which is characterized in that the switching capacity conversion chip, also
For being in pass-through state according to the second control instruction of the processor.
9. a kind of terminal characterized by comprising the described in any item wireless charging receivers of claim 1-8.
10. terminal according to claim 9, which is characterized in that the terminal further include: processor；
The switching capacity conversion chip is also used to detection path electric current, and is greater than or equal to current threshold in the passage current
When the sum of value and the first current offset amount, controls the switching capacity conversion chip and enter current-limit mode, first electric current is inclined
Shifting amount is greater than or equal to 0, and is less than the current threshold；
The processor, for according to current desired passage current, exporting the first control for adjusting the current threshold
Instruction；
The switching capacity conversion chip is also used to adjust the current threshold according to first control instruction.
11. terminal according to claim 10, which is characterized in that the processor is also used to according to the switching capacity
The conducting resistance of the internal switch pipe of conversion chip, the capacitor conversion chip internal switch pipe on state or described
The charging time of charging capacitor in switching capacity conversion chip, control reduce the reception chip of the wireless charging receiver
Output voltage.
12. terminal according to claim 10, which is characterized in that the processor is also used to entering constant-voltage charge rank
Duan Shi exports the second control instruction for being in pass-through state for controlling the switching capacity conversion chip；
The switching capacity conversion chip is also used to be in pass-through state according to second control instruction.
13. a kind of charging system characterized by comprising wireless charging emitter, battery and claim 1-5 are any
Wireless charging receiver described in.
14. charging system according to claim 13, which is characterized in that the charging system further include: processor；
The switching capacity conversion chip is also used to detection path electric current, and is greater than or equal to current threshold in the passage current
When the sum of value and the first current offset amount, controls the switching capacity conversion chip and enter current-limit mode, first electric current is inclined
Shifting amount is greater than or equal to 0, and is less than the current threshold；
The processor, for according to current desired passage current, exporting the first control for adjusting the current threshold
Instruction；
The switching capacity conversion chip is also used to adjust the current threshold according to first control instruction.
15. charging system according to claim 14, which is characterized in that the processor is also used to according to the switch
The conducting resistance of the internal switch pipe of capacitor conversion chip, the capacitor conversion chip internal switch pipe on state or
The charging time of charging capacitor in the switching capacity conversion chip, control reduce the reception core of the wireless charging receiver
The output voltage of piece.
16. charging system according to claim 15, which is characterized in that the processor is also used to fill into constant pressure
When the electric stage, the second control instruction for being in pass-through state for controlling the switching capacity conversion chip is exported；
The switching capacity conversion chip is also used to be in pass-through state according to second control instruction.
17. charging system according to claim 13, which is characterized in that the wireless charging emitter includes: charging
Device, transmitting chip and transmitting coil；The input terminal of the transmitting chip and the charger couple, the output of the transmitting chip
End is coupled with the transmitting coil；
The transmitting chip, for controlling the direct current of the charger output based on control protocol and the charger communication
The voltage in source, and the DC power supply is converted into AC power source；
The transmitting coil, for the AC power source to be converted into alternating magnetic field.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811137409.2A CN109274147B (en) | 2018-09-28 | 2018-09-28 | Wireless charging receiving device, charging system and terminal |
| KR1020197019707A KR102207502B1 (en) | 2018-09-28 | 2018-11-14 | Wireless charging receiving device, charging system and terminal |
| JP2019537374A JP6949121B2 (en) | 2018-09-28 | 2018-11-14 | Wireless charging receivers, charging systems and terminals |
| RU2019127409A RU2733214C1 (en) | 2018-09-28 | 2018-11-14 | Wireless charging receiver, charging system and terminal |
| PCT/CN2018/115420 WO2020062481A1 (en) | 2018-09-28 | 2018-11-14 | Wireless charging receiving apparatus, charging system and terminal |
| US16/554,366 US11527905B2 (en) | 2018-09-28 | 2019-08-28 | Wireless charging receiver, charging system and terminal |
| EP19195677.0A EP3651315A1 (en) | 2018-09-28 | 2019-09-05 | Wireless charging receiver, charging system and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811137409.2A CN109274147B (en) | 2018-09-28 | 2018-09-28 | Wireless charging receiving device, charging system and terminal |
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| CN109274147A true CN109274147A (en) | 2019-01-25 |
| CN109274147B CN109274147B (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811137409.2A Active CN109274147B (en) | 2018-09-28 | 2018-09-28 | Wireless charging receiving device, charging system and terminal |
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| Country | Link |
|---|---|
| US (1) | US11527905B2 (en) |
| EP (1) | EP3651315A1 (en) |
| JP (1) | JP6949121B2 (en) |
| KR (1) | KR102207502B1 (en) |
| CN (1) | CN109274147B (en) |
| RU (1) | RU2733214C1 (en) |
| WO (1) | WO2020062481A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111953082A (en) * | 2019-05-14 | 2020-11-17 | X2 动力科技有限公司 | Efficient wireless charging system and method |
| WO2021052188A1 (en) * | 2019-09-18 | 2021-03-25 | 华为技术有限公司 | Rectifier chip and terminal device |
| WO2022002096A1 (en) * | 2020-07-03 | 2022-01-06 | 华为技术有限公司 | Resonant switching capacitor circuit and electronic device |
| WO2022246675A1 (en) * | 2021-05-26 | 2022-12-01 | 华为数字能源技术有限公司 | Electronic device and method for reverse wireless charging |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200099416A (en) * | 2019-02-14 | 2020-08-24 | 삼성전자주식회사 | Method to charge battery and electronic device applying the method |
| CN112072913B (en) * | 2020-09-22 | 2021-10-29 | 禹创半导体(深圳)有限公司 | High-compatibility power supply framework for driving display IC |
| US20220311326A1 (en) * | 2021-03-24 | 2022-09-29 | Psemi Corporation | Power converters and methods for protecting power converters |
| CN117526471A (en) * | 2022-07-28 | 2024-02-06 | 北京小米移动软件有限公司 | Wireless charging circuit applied to wearable device and wearable device |
| CN116811588B (en) * | 2023-08-31 | 2024-02-09 | 宁德时代新能源科技股份有限公司 | Electric power system and electric automobile |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140129914A (en) * | 2013-04-30 | 2014-11-07 | 인텔렉추얼디스커버리 주식회사 | Apparatus and method for receiving wireless power |
| CN107947305A (en) * | 2017-12-01 | 2018-04-20 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system, method and terminal device |
| CN108233454A (en) * | 2017-07-31 | 2018-06-29 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system, method and electronic equipment |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU133370U1 (en) * | 2013-05-20 | 2013-10-10 | Федеральное государственное унитарное предприятие "18 Центральный научно-исследовательский институт" Министерства обороны Российской Федерации | PORTABLE BATTERY INDUCTIVE CHARGING SYSTEM |
| CN105763048A (en) * | 2016-04-15 | 2016-07-13 | 上海交通大学 | Buck convertor with series voltage-reducing current-increasing circuit |
| GB2550368A (en) * | 2016-05-17 | 2017-11-22 | General Electric Technology Gmbh | Control of high-voltage, direct current systems |
| US10516284B2 (en) * | 2016-09-15 | 2019-12-24 | Qualcomm Incorporated | Voltage controlled charge pump and battery charger |
| WO2018085448A1 (en) * | 2016-11-01 | 2018-05-11 | Lion Semiconductor Inc. | Feedback control for efficient high-speed battery charging |
| CN108233455A (en) * | 2017-07-31 | 2018-06-29 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, method, system and electronic equipment |
| CN207518328U (en) * | 2017-07-31 | 2018-06-19 | 珠海市魅族科技有限公司 | A kind of terminal device and wireless charging system |
| CN207518336U (en) * | 2017-07-31 | 2018-06-19 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system and electronic equipment |
| CN207766037U (en) * | 2017-12-01 | 2018-08-24 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system and terminal device |
| CN108183559A (en) * | 2018-01-12 | 2018-06-19 | 广东希荻微电子有限公司 | The single-chip method of work that wireless charging receiving terminal directly charges the battery |
| CN108539832A (en) * | 2018-03-16 | 2018-09-14 | 维沃移动通信有限公司 | Wireless charging receiving terminal equipment, wireless charging method, system and terminal device |
-
2018
- 2018-09-28 CN CN201811137409.2A patent/CN109274147B/en active Active
- 2018-11-14 KR KR1020197019707A patent/KR102207502B1/en active IP Right Grant
- 2018-11-14 JP JP2019537374A patent/JP6949121B2/en active Active
- 2018-11-14 WO PCT/CN2018/115420 patent/WO2020062481A1/en active Application Filing
- 2018-11-14 RU RU2019127409A patent/RU2733214C1/en active
-
2019
- 2019-08-28 US US16/554,366 patent/US11527905B2/en active Active
- 2019-09-05 EP EP19195677.0A patent/EP3651315A1/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140129914A (en) * | 2013-04-30 | 2014-11-07 | 인텔렉추얼디스커버리 주식회사 | Apparatus and method for receiving wireless power |
| CN108233454A (en) * | 2017-07-31 | 2018-06-29 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system, method and electronic equipment |
| CN107947305A (en) * | 2017-12-01 | 2018-04-20 | 珠海市魅族科技有限公司 | A kind of wireless charging circuit, system, method and terminal device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111953082A (en) * | 2019-05-14 | 2020-11-17 | X2 动力科技有限公司 | Efficient wireless charging system and method |
| US11563337B2 (en) | 2019-05-14 | 2023-01-24 | Nuvolta Technologies (Hefei) Co., Ltd. | High efficiency wireless charging system and method |
| CN111953082B (en) * | 2019-05-14 | 2023-12-22 | 伏达半导体(合肥)股份有限公司 | Efficient wireless charging system and method |
| WO2021052188A1 (en) * | 2019-09-18 | 2021-03-25 | 华为技术有限公司 | Rectifier chip and terminal device |
| WO2022002096A1 (en) * | 2020-07-03 | 2022-01-06 | 华为技术有限公司 | Resonant switching capacitor circuit and electronic device |
| WO2022246675A1 (en) * | 2021-05-26 | 2022-12-01 | 华为数字能源技术有限公司 | Electronic device and method for reverse wireless charging |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020062481A1 (en) | 2020-04-02 |
| EP3651315A1 (en) | 2020-05-13 |
| JP6949121B2 (en) | 2021-10-13 |
| US20200106290A1 (en) | 2020-04-02 |
| JP2021502040A (en) | 2021-01-21 |
| RU2733214C1 (en) | 2020-09-30 |
| CN109274147B (en) | 2020-12-29 |
| KR20200037120A (en) | 2020-04-08 |
| US11527905B2 (en) | 2022-12-13 |
| KR102207502B1 (en) | 2021-01-25 |
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